DES MOINES (AP) — Authorities say seven people died — including two teenage sisters — on Iowa roads as a winter storm swept the state Monday, leading to dozens of crashes and a 50- to 70-car pileup near Ames.

Avery Arneson, 17, and Aiden Arneson, 13, sisters from Decorah, died in a two-vehicle crash around 8:30 a.m. Monday on a county road in northeast Iowa. Four other teens were injured and hospitalized in that crash.

In Cedar Rapids, two men died in a crash on Interstate 380. Killed were 24-year-old Jacolby Jesse Burks, of Cedar Rapids, and 21-year-old Devion Martel Luster, of Dixon, Ill.

One person died and several people were critically injured in the pileup that closed Interstate 35 near Ames.

On I-80, police say a person was killed in a crash east of Grinnell around 1:20 p.m., and another person died and two others were injured at 1:40 p.m. near Durant.

Officials say a bus carrying the touring cast and crew of “Dancing with the Stars” was involved in a large pileup during a snow storm in central Iowa, but no one on the bus was seriously hurt.

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